Uninterruptible power supply system

Abstract

An improved uninterruptible power supply system includes a converter for converting alternating current voltage into a direct current voltage; an inverter for modulating the direct current voltage outputted from a battery or the converter; a first switch for switching the voltage modulated at the inverter; a second switch for switching the alternating voltage inputted via a bypass line; an integrated transformer for increasing or decreasing the output voltages of the first and the second switches, the transformer also acting as a reactor for shaping the output voltage of the first switch; and a condenser for shaping the waveforms of the output voltage of the integrated transformer.

What is claimed is: 
     
       1. An uninterruptible power supply system, comprising: converter means for converting an alternating current voltage into a direct current voltage;   inverter means for modulating direct current voltage outputted from a battery or from the converter means;   first switch means for switching the voltage modulated by the inverter means;   second switch means for switching an alternating voltage inputted through a bypass line;   an integrated transformer for increasing or decreasing output voltages of the first switch means and the second switch means, and for acting as a reactor, so that the output voltage of the first switch means is shaped, wherein said integrated transformer comprises: first and second cores spaced apart from each other by a predetermined distance;   a first coil wound onto the first and second cores and having a reactance, for receiving an output voltage of the first switch means;   a second coil wound onto the first core, for receiving an output voltage of the second switch means; and   a third coil wound onto the first core, for outputting a voltage induced from therein the first coil or the second coil; and     a condenser for shaping the waveforms of the output voltage of the integrated transformer.   
     
     
       2. The system of claim 1, wherein said first and second cores are separated from each other by a spacer which is made of an insulated material. 
     
     
       3. The system of claim 1, wherein said second core includes at least one gap therein. 
     
     
       4. The system of claim 1, wherein said first coil and said third coil act as a primary coil and a secondary coil respectively of said integrated transformer when the system is not supplying power, whereas said first coil acts as a reactor and as a primary coil of said integrated transformer when the system is supplying power. 
     
     
       5. An uninterruptible power supply system, comprising: converter means for converting an alternating current voltage into a direct current voltage;   inverter means for modulating direct current voltage outputted from a battery or from the converter means;   first switch means for switching the voltage modulated by the inverter means;   second switch means for switching an alternating voltage inputted through a bypass line;   an integrated transformer for increasing or decreasing output voltages of the first switch means and the second switch means, and for acting as a reactor, so that the output voltage of the first switch means is shaped, wherein said integrated transformer includes: first and second cores spaced apart from each other by a predetermined distance;   a first coil wound onto the first and second cores and having a reactance, for receiving an output voltage of the first switch means; and   a second coil wound onto the first core, for outputting a voltage induced from therein the first coil or the second coil; and     a condenser for shaping the waveform of the output voltage of the integrated transformer or the output voltage of the second switch means.